G4CrossSectionDataSet Class Reference

#include <G4CrossSectionDataSet.hh>

Inheritance diagram for G4CrossSectionDataSet:

Collaboration diagram for G4CrossSectionDataSet:

Public Member Functions
	G4CrossSectionDataSet (G4VDataSetAlgorithm *algo, G4double xUnit=CLHEP::MeV, G4double dataUnit=CLHEP::barn)
virtual	~G4CrossSectionDataSet ()
virtual G4double	FindValue (G4double e, G4int componentId=0) const
virtual void	PrintData (void) const
virtual const G4VEMDataSet *	GetComponent (G4int componentId) const
virtual void	AddComponent (G4VEMDataSet *dataSet)
virtual size_t	NumberOfComponents (void) const
virtual const G4DataVector &	GetEnergies (G4int componentId) const
virtual const G4DataVector &	GetData (G4int componentId) const
virtual const G4DataVector &	GetLogEnergies (G4int componentId) const
virtual const G4DataVector &	GetLogData (G4int componentId) const
virtual void	SetEnergiesData (G4DataVector *x, G4DataVector *values, G4int componentId)
virtual void	SetLogEnergiesData (G4DataVector *x, G4DataVector *values, G4DataVector *log_x, G4DataVector *log_values, G4int componentId)
virtual G4bool	LoadData (const G4String &argFileName)
virtual G4bool	LoadNonLogData (const G4String &argFileName)
virtual G4bool	SaveData (const G4String &argFileName) const
virtual G4double	RandomSelect (G4int) const
Public Member Functions inherited from G4VEMDataSet
	G4VEMDataSet ()
virtual	~G4VEMDataSet ()

Detailed Description

Definition at line 55 of file G4CrossSectionDataSet.hh.

Constructor & Destructor Documentation

G4CrossSectionDataSet::G4CrossSectionDataSet	(	G4VDataSetAlgorithm *	algo,
		G4double	xUnit = CLHEP::MeV,
		G4double	dataUnit = CLHEP::barn
	)

Definition at line 65 of file G4CrossSectionDataSet.cc.

  :
   algorithm(argAlgorithm), unitEnergies(argUnitEnergies), unitData(argUnitData)
{
  z = 0;

}

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G4CrossSectionDataSet::~G4CrossSectionDataSet ( )

virtual

Definition at line 76 of file G4CrossSectionDataSet.cc.

{
  CleanUpComponents();
 
  if (algorithm)
    delete algorithm;
}

Member Function Documentation

virtual void G4CrossSectionDataSet::AddComponent ( G4VEMDataSet *  dataSet )

inlinevirtual

Implements G4VEMDataSet.

Definition at line 72 of file G4CrossSectionDataSet.hh.

  { components.push_back(dataSet); }

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G4double G4CrossSectionDataSet::FindValue ( G4double  e, G4int  componentId = 0  ) const

virtual

Implements G4VEMDataSet.

Definition at line 482 of file G4CrossSectionDataSet.cc.

{
  // Returns the sum over the shells corresponding to e
  G4double value = 0.;

  std::vector<G4VEMDataSet *>::const_iterator i(components.begin());
  std::vector<G4VEMDataSet *>::const_iterator end(components.end());

  while (i!=end)
    {
      value+=(*i)->FindValue(argEnergy);
      i++;
    }

  return value;
}

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virtual const G4VEMDataSet* G4CrossSectionDataSet::GetComponent ( G4int  componentId ) const

inlinevirtual

Implements G4VEMDataSet.

Definition at line 69 of file G4CrossSectionDataSet.hh.

  { return components[componentId]; }

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virtual const G4DataVector& G4CrossSectionDataSet::GetData ( G4int  componentId ) const

inlinevirtual

Implements G4VEMDataSet.

Definition at line 81 of file G4CrossSectionDataSet.hh.

  { return GetComponent(componentId)->GetData(0); }

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virtual const G4DataVector& G4CrossSectionDataSet::GetEnergies ( G4int  componentId ) const

inlinevirtual

Implements G4VEMDataSet.

Definition at line 78 of file G4CrossSectionDataSet.hh.

  { return GetComponent(componentId)->GetEnergies(0); }

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virtual const G4DataVector& G4CrossSectionDataSet::GetLogData ( G4int  componentId ) const

inlinevirtual

Implements G4VEMDataSet.

Definition at line 87 of file G4CrossSectionDataSet.hh.

  { return GetComponent(componentId)->GetLogData(0); }

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virtual const G4DataVector& G4CrossSectionDataSet::GetLogEnergies ( G4int  componentId ) const

inlinevirtual

Implements G4VEMDataSet.

Definition at line 84 of file G4CrossSectionDataSet.hh.

  { return GetComponent(componentId)->GetLogEnergies(0); }

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G4bool G4CrossSectionDataSet::LoadData ( const G4String &  argFileName )

virtual

Implements G4VEMDataSet.

Definition at line 84 of file G4CrossSectionDataSet.cc.

{
  CleanUpComponents();

  G4String fullFileName(FullFileName(argFileName));
  std::ifstream in(fullFileName, std::ifstream::binary|std::ifstream::in);

  if (!in.is_open())
    {
      G4String message("data file \"");
      message+=fullFileName;
      message+="\" not found";
      G4Exception("G4CrossSectionDataSet::LoadData",
            "em0003",FatalException,message);
      return false;
    }

  std::vector<G4DataVector *> columns;
  std::vector<G4DataVector *> log_columns;

  std::stringstream *stream(new std::stringstream);
  char c;
  G4bool comment(false);
  G4bool space(true);
  G4bool first(true);

  try
    {
      while (!in.eof())
    {
      in.get(c);
   
      switch (c)
        {
        case '\r':
        case '\n':
          if (!first)
        {
          unsigned long i(0);
          G4double value;
      
          while (!stream->eof())
            {
              (*stream) >> value;
       
              while (i>=columns.size())
                        {
             columns.push_back(new G4DataVector);
                         log_columns.push_back(new G4DataVector);
                        }
      
              columns[i]->push_back(value);

// N. A. Karakatsanis
// A condition is applied to check if negative or zero values are present in the dataset.
// If yes, then a near-zero value is applied to allow the computation of the logarithmic value
// If a value is zero, this simplification is acceptable
// If a value is negative, then it is not acceptable and the data of the particular column of
// logarithmic values should not be used by interpolation methods.
//
// Therefore, G4LogLogInterpolation and G4LinLogLogInterpolation should not be used if negative values are present.
// Instead, G4LinInterpolation is safe in every case
// SemiLogInterpolation is safe only if the energy columns are non-negative
// G4LinLogInterpolation is safe only if the cross section data columns are non-negative

                      if (value <=0.) value = 1e-300;
                      log_columns[i]->push_back(std::log10(value));
       
              i++;
            }
      
          delete stream;
          stream=new std::stringstream;
        }
     
          first=true;
          comment=false;
          space=true;
          break;
     
        case '#':
          comment=true;
          break;
     
        case '\t':
        case ' ':
          space = true;
              break;

        default:
          if (comment) { break; }
          if (space && (!first)) { (*stream) << ' '; }

          first=false;
          (*stream) << c;
          space=false;
        }
    }
    }
  catch(const std::ios::failure &e)
    {
      // some implementations of STL could throw a "failture" exception
      // when read wants read characters after end of file
    }
 
  delete stream;
 
  std::vector<G4DataVector *>::size_type maxI(columns.size());
 
  if (maxI<2)
    {
      G4String message("data file \"");
      message+=fullFileName;
      message+="\" should have at least two columns";
      G4Exception("G4CrossSectionDataSet::LoadData",
            "em0005",FatalException,message);
      return false;
    }
 
  std::vector<G4DataVector*>::size_type i(1);
  while (i<maxI)
    {
      G4DataVector::size_type maxJ(columns[i]->size());

      if (maxJ!=columns[0]->size())
    {
      G4String message("data file \"");
      message+=fullFileName;
      message+="\" has lines with a different number of columns";
          G4Exception("G4CrossSectionDataSet::LoadData",
            "em0005",FatalException,message);
      return false;
    }

      G4DataVector::size_type j(0);

      G4DataVector *argEnergies=new G4DataVector;
      G4DataVector *argData=new G4DataVector;
      G4DataVector *argLogEnergies=new G4DataVector;
      G4DataVector *argLogData=new G4DataVector;

      while(j<maxJ)
    {
      argEnergies->push_back(columns[0]->operator[] (j)*GetUnitEnergies());
      argData->push_back(columns[i]->operator[] (j)*GetUnitData());
      argLogEnergies->push_back(log_columns[0]->operator[] (j) + std::log10(GetUnitEnergies()));
      argLogData->push_back(log_columns[i]->operator[] (j) + std::log10(GetUnitData()));
      j++;
    }

      AddComponent(new G4EMDataSet(i-1, argEnergies, argData, argLogEnergies, argLogData, GetAlgorithm()->Clone(), GetUnitEnergies(), GetUnitData()));
  
      i++;
    }

  i=maxI;
  while (i>0)
    {
      i--;
      delete columns[i];
      delete log_columns[i];
    }

  return true;
}

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G4bool G4CrossSectionDataSet::LoadNonLogData ( const G4String &  argFileName )

virtual

Implements G4VEMDataSet.

Definition at line 251 of file G4CrossSectionDataSet.cc.

{
  CleanUpComponents();

  G4String fullFileName(FullFileName(argFileName));
  std::ifstream in(fullFileName, std::ifstream::binary|std::ifstream::in);

  if (!in.is_open())
    {
      G4String message("data file \"");
      message+=fullFileName;
      message+="\" not found";
      G4Exception("G4CrossSectionDataSet::LoadNonLogData",
            "em0003",FatalException,message);
      return false;
    }

  std::vector<G4DataVector *> columns;

  std::stringstream *stream(new std::stringstream);
  char c;
  G4bool comment(false);
  G4bool space(true);
  G4bool first(true);

  try
    {
      while (!in.eof())
    {
      in.get(c);
   
      switch (c)
        {
        case '\r':
        case '\n':
          if (!first)
        {
          unsigned long i(0);
          G4double value;
      
          while (!stream->eof())
            {
              (*stream) >> value;
       
              while (i>=columns.size())
                        {
             columns.push_back(new G4DataVector);
                        }
      
              columns[i]->push_back(value);
       
              i++;
            }
      
          delete stream;
          stream=new std::stringstream;
        }
     
          first=true;
          comment=false;
          space=true;
          break;
     
        case '#':
          comment=true;
          break;
     
        case '\t':
        case ' ':
          space = true;
              break;

        default:
          if (comment) { break; }
          if (space && (!first)) { (*stream) << ' '; }

          first=false;
          (*stream) << c;
          space=false;
        }
    }
    }
  catch(const std::ios::failure &e)
    {
      // some implementations of STL could throw a "failture" exception
      // when read wants read characters after end of file
    }
 
  delete stream;
 
  std::vector<G4DataVector *>::size_type maxI(columns.size());
 
  if (maxI<2)
    {
      G4String message("data file \"");
      message+=fullFileName;
      message+="\" should have at least two columns";
      G4Exception("G4CrossSectionDataSet::LoadNonLogData",
            "em0005",FatalException,message);
      return false;
    }
 
  std::vector<G4DataVector*>::size_type i(1);
  while (i<maxI)
    {
      G4DataVector::size_type maxJ(columns[i]->size());

      if (maxJ!=columns[0]->size())
    {
      G4String message("data file \"");
      message+=fullFileName;
      message+="\" has lines with a different number of columns";
          G4Exception("G4CrossSectionDataSet::LoadNonLogData",
            "em0005",FatalException,message);
      return false;
    }

      G4DataVector::size_type j(0);

      G4DataVector *argEnergies=new G4DataVector;
      G4DataVector *argData=new G4DataVector;

      while(j<maxJ)
    {
      argEnergies->push_back(columns[0]->operator[] (j)*GetUnitEnergies());
      argData->push_back(columns[i]->operator[] (j)*GetUnitData());
      j++;
    }

      AddComponent(new G4EMDataSet(i-1, argEnergies, argData, GetAlgorithm()->Clone(), GetUnitEnergies(), GetUnitData()));
  
      i++;
    }

  i=maxI;
  while (i>0)
    {
      i--;
      delete columns[i];
    }

  return true;
}

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virtual size_t G4CrossSectionDataSet::NumberOfComponents ( void  ) const

inlinevirtual

Implements G4VEMDataSet.

Definition at line 75 of file G4CrossSectionDataSet.hh.

  { return components.size(); }

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void G4CrossSectionDataSet::PrintData ( void  ) const

virtual

Implements G4VEMDataSet.

Definition at line 500 of file G4CrossSectionDataSet.cc.

{
  const size_t n(NumberOfComponents());

  G4cout << "The data set has " << n << " components" << G4endl;
  G4cout << G4endl;
 
  size_t i(0);
 
  while (i<n)
    {
      G4cout << "--- Component " << i << " ---" << G4endl;
      GetComponent(i)->PrintData();
      i++;
    }
}

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virtual G4double G4CrossSectionDataSet::RandomSelect ( G4int  ) const

inlinevirtual

Implements G4VEMDataSet.

Definition at line 103 of file G4CrossSectionDataSet.hh.

{ return -1.; };

G4bool G4CrossSectionDataSet::SaveData ( const G4String &  argFileName ) const

virtual

Implements G4VEMDataSet.

Definition at line 396 of file G4CrossSectionDataSet.cc.

{
  const size_t n(NumberOfComponents());
 
  if (n==0)
    {
      G4Exception("G4CrossSectionDataSet::SaveData",
            "em0005",FatalException,"expected at least one component");
      return false;
    }
 
  G4String fullFileName(FullFileName(argFileName));
  std::ofstream out(fullFileName);

  if (!out.is_open())
    {
      G4String message("cannot open \"");
      message+=fullFileName;
      message+="\"";
      G4Exception("G4CrossSectionDataSet::SaveData",
            "em0003",FatalException,message);
      return false;
    }
 
  G4DataVector::const_iterator iEnergies(GetComponent(0)->GetEnergies(0).begin());
  G4DataVector::const_iterator iEnergiesEnd(GetComponent(0)->GetEnergies(0).end());
  G4DataVector::const_iterator * iData(new G4DataVector::const_iterator[n]);
 
  size_t k(n);
 
  while (k>0)
    {
      k--;
      iData[k]=GetComponent(k)->GetData(0).begin();
    }
 
  while (iEnergies!=iEnergiesEnd)
    {
      out.precision(10);
      out.width(15);
      out.setf(std::ofstream::left);
      out << ((*iEnergies)/GetUnitEnergies());
  
      k=0;
  
      while (k<n)
    {
      out << ' ';
      out.precision(10);
      out.width(15);
      out.setf(std::ofstream::left);
      out << ((*(iData[k]))/GetUnitData());

      iData[k]++;
      k++;
    }
  
      out << std::endl;
  
      iEnergies++;
    }
 
  delete[] iData;

  return true;
}

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void G4CrossSectionDataSet::SetEnergiesData ( G4DataVector *  x, G4DataVector *  values, G4int  componentId  )

virtual

Implements G4VEMDataSet.

Definition at line 518 of file G4CrossSectionDataSet.cc.

{
  G4VEMDataSet * component(components[argComponentId]);
 
  if (component)
    {
      component->SetEnergiesData(argEnergies, argData, 0);
      return;
    }

  std::ostringstream message;
  message << "component " << argComponentId << " not found";
 
  G4Exception("G4CrossSectionDataSet::SetEnergiesData",
           "em0005",FatalException,message.str().c_str());
}

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void G4CrossSectionDataSet::SetLogEnergiesData ( G4DataVector *  x, G4DataVector *  values, G4DataVector *  log_x, G4DataVector *  log_values, G4int  componentId  )

virtual

Implements G4VEMDataSet.

Definition at line 538 of file G4CrossSectionDataSet.cc.

{
  G4VEMDataSet * component(components[argComponentId]);
 
  if (component)
    {
      component->SetLogEnergiesData(argEnergies, argData, argLogEnergies, argLogData, 0);
      return;
    }

  std::ostringstream message;
  message << "component " << argComponentId << " not found";
 
  G4Exception("G4CrossSectionDataSet::SetLogEnergiesData",
           "em0005",FatalException,message.str().c_str());
}

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---

The documentation for this class was generated from the following files:

• source/geant4.10.03.p02/source/processes/electromagnetic/lowenergy/include/G4CrossSectionDataSet.hh
• source/geant4.10.03.p02/source/processes/electromagnetic/lowenergy/src/G4CrossSectionDataSet.cc